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MLT-5018 - SMD電磁無源蜂鳴器

  1. Technical Parameter

Measuring condition
       Part shall be measured under a condition (Temperature: 5~35℃, Humidity: 45%~85%R.H., Atmospheric pressure: 860 ~1060hPa) unless the standard condition (Temperature: 25±3℃, Humidity: 60±10%R.H. Atmospheric pressure: 860 ~1060hPa) is regulated to measure.


Rated Voltage



Operating Voltage



Rated Current

Max.100mA at 4000Hz 50% duty Square Ware 3.0Vo-P


Sound Output at 10cm

Min. 75Db,at 4000Hz 50% duty Square Ware 3.0Vo-p


Coil Resistance



Resonant Frequency



Operating Temperature



Store Temperature



Net Weight

Approx 0.1g




  1. Dimensions

Unit: mm


*Unit: mm; Tolerance: ±0.3mm Except Specified
     *Housing Material: Black LCP
     *Terminal plate: 3 soldering pads, tin Plating Brass

  1. Electrical And Acoustical Measuring Condition

Recommended Driving Circuit
     Resonant frequency, 1/2 duty cycle. Square wave.
     Signal amplitude should be large enough tosaturate
     the transistor.

Recommended Setting

  1. Frequency Response


3.0Vo-p 50% duty Square wave,10cm

  1. Surface mounting condition

5.1 Reflow soldering
       Recommendable reflow soldering condition is as follows.
       Note: (1) In automated mounting of the SMD sound transducers on PCB, any bending, expanding
       and pulling forces or shocks against the SMD sound transducers shall be kept minimum
       to prevent them from electrical failures and mechanical damages of the devices.
       (2) In the reflow soldering, too high soldering temperatures and too large temperature
       Gradient such as rapid heating or cooling may cause electrical failures and mechanical
       damages of the devices.

  1. Reliability Test

After any following tests the part shall meet specifications without any degradation in
       appearance and performance except SPL. SPL shall not deviate more than -10 dB
       from the initial value

    1. Ordinary Temperature Life Test

The part shall be subjected to 96 hours at 25±10℃. Input rated voltage
       Resonant frequency, 1/2 duty Square wave.
       6.2 High Temperature Test
       The part shall be capable of with standing a storage temperature of +80℃ for 96 hours.
       6.3 Low Temperature Test 
       The part shall be capable of with standing a storage temperature of -30℃ for 96 hours.

    1. Humidity Test

Temperature:+40℃±3℃   Relative Humidity:90%~95% Duration: 48 hours
       and expose to room temperature for 6 hours

    1. Temperature Shock Test

Temperature:60℃ /1hour→ 25℃/3hours→-20℃/1hour→ 25℃/3hours (1cycle)
       Total cycle: 10 cycles

    1. Drop Test

Standard Packaging From 75cm(Drop on hard wood or board of 5cm thick,
       three sides, six plain.)

    1. Vibration Test

Vibration:1000cycles /min. Amplitude:1.5mm, Duration: 1 hour in each 3 axes

    1. Reflow Test

Use recommendable reflow soldering condition (as shown in 5.1)
       (1) No abnormality should be found after reflow
       (2) Good soldering to meet soldering requirements


       As this product is not protected from foreign material entering, please make sure that any foreign materials (e.g. magnetic powder, washing solvent, flux, corrosive gas) do not enter this product in your production processes. The functional degradation (e.g. SPL down) may occur if foreign material enter it.

  1. Packing